Nick on CBS was a Saturday morning programming block that was broadcast from 2000 to 2006 on CBS. It was launched under the name Nick Jr. on CBS. In 2002, the name was changed to Nick on CBS to emphasize that it aired a mix of Nick Jr. and Nickelodeon programming. The block returned to its original name in 2004. The block officially closed upon the formation of CBS Corporation and the second Viacom, The block was replaced with a Saturday morning block formed as a partnership with the kids division of AOL (KOL). The new block was named KOL Secret Slumber Party.